Repair TimeMachine Backup

repair_timemachine_backup.md

Repair TimeMachine Backup

1. Mount timemachine volume from Finder.
2. Unlock Target Machine's Backup sparsebundle.
   sudo chflags -R nouchg /Volumes/{TimeMachine Volume Name}/{Target Machine's Name}.sparsebundle
3. Attach sparsebundle then Listing Backup Volume.
   hdiutil attach -nomount -noverify -noautofsck /Volumes/{TimeMachine Volume Name}/{Target Machine's Name}.sparsebundle
4. Repair backup volume.
   fsck_hfs -drfy /dev/disk2s2
5. Detach backup sparsebundle.
   hdiutil detach /dev/disk2s2
6. Fix TimeMachine state flag at /Volumes/{TimeMachine Volume Name}/{Target Machine's Name}.sparsebundle/com.apple.TimeMachine.MachineID.plist
   • Delete following lines.

RecoveryBackupDeclinedDate {Date}

  * Replace following lines.

VerificationState 2

　 to

VerificationState 0

7. That's all!